/// <summary>
// CodeFx - A .NET framework
// Laurent Morisseau
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
// Laurent Morisseau
/// </summary>
/// <author><a href="mailto:laurent.morisseau@gmail.com">Laurent Morisseau</a></author>

using System;
using System.Web;

namespace CodeFx.Web
{
	/// <summary>
	/// A class that holds static methods to check query string data
	/// </summary>
	public static class QueryStringHelper
	{
		/// <summary>
		/// Check to see that your Query String is a positive number within int value
		/// As well as checking to see that the number has only 9 digits
		/// </summary>
		/// <param name="qString"></param>
		/// <returns></returns>
        public static bool CheckPositiveInteger(string qString, out int result)
        {
            if (!string.IsNullOrEmpty(qString) && HttpContext.Current.Request.QueryString[qString] != null)
            {
                return int.TryParse(HttpContext.Current.Request.QueryString[qString], out result);
            }
            result = 0;
            return false;
        }
        public static bool CheckPositiveInteger(string qString)
        {
            int result;
            return CheckPositiveInteger(qString, out result);
        }

		/// <summary>
		/// Check that it only contains charaters
		/// </summary>
		/// <param name="qString"></param>
		/// <returns></returns>
		public static bool CheckString(string qString)
		{
            if (!string.IsNullOrEmpty(qString) && HttpContext.Current.Request.QueryString[qString] != null)
            {
                string qStringValue = HttpContext.Current.Request.QueryString[qString];
                if (string.IsNullOrEmpty(qStringValue))
                {
                    return false;
                }
                bool isWord = true;
                int imax = qStringValue.Length;
                for (int i = 0; i < imax; i++)
                {
                    if (!char.IsLetter(qStringValue, i))
                    {
                        isWord = false;
                        break;
                    }
                }
                return isWord;
            }
            else
                return false;
		}
	}
}
